A month after releasing the architecture specifications and hypervisor APIs for its UltraSPARC T1 processor to the open-source community, Sun is putting out more information on the chip. Sun on March 21 will publish the hardware design for the T1 - formerly codenamed Niagara - and the Solaris operating system simulation specifications for the chip. The move is the latest in the company's OpenSPARC project, designed to enable hardware and software developers to build atop the new chip's architecture. The goal is to build an ecosystem around the processor that will expand the reach of the SPARC platform. In addition, Sun's grid will finally launch this week.